NASA is monitoring three aircraft-sized asteroids that will zoom past the Earth later today at around 19,000 to 22,200 miles per hour.

A new study by Rice University researchers Sho Shibata and Andre Izidoro presents a compelling new model for the formation of ...

Once the new measurements were taken and the math was done, the probability of YR4 hitting the Earth began to decline, ...

Scientists with a new theory about how Earth’s early continents formed predicted where a superold impact crater should ...

Another finding was how dramatically the planets varied in brightness over just three years. The team discovered that PDS 70 ...

Any telescope on the planet can contribute to planetary defense: If an astronomer anywhere on Earth spies an object that looks like an asteroid (or comet), they can report its findings to the ...

Then there is the outer core, made of liquid metal, and the inner core, a solid ball of metal ... materials and incredible ...

and suggests a place to look for signs of ancient life on the red planet, if we can get there with the right equipment. A graphic demonstrating how sediment layers are deposited at Earth's beaches.

When this happens, the planets always appear along a line or an arc, NASA adds, due to the way they are viewed from Earth. "Planetary alignments, where multiple planets appear close together in ...

The ecliptic is also the reason that we on Earth sometimes observe planets appearing to approach closely to each other in the sky "while they careen around the cosmic racetrack," according to NASA.